AC-6385:TypeError: explode(): Argument #2 ($string) must be of type string

Author: glo17680

app/code/Magento/Config/Controller/Adminhtml/System/Config/Save.php

@@ -8,6 +8,7 @@
 
 use Magento\Framework\App\Action\HttpPostActionInterface as HttpPostActionInterface;
 use Magento\Config\Controller\Adminhtml\System\AbstractConfig;
+use Magento\Framework\Exception\LocalizedException;
 
 /**
  * System Configuration Save Controller
@@ -221,6 +222,22 @@ public function execute()
             ];
             $configData = $this->filterNodes($configData);
 
+            $europeanUnionCountriesSelectedValues = true;
+            $fields = $configData['groups']['country']['fields'];
+            if (isset($fields['eu_countries'])) {
+                if (empty($fields['eu_countries']['value']) &&
+                    !isset($fields['eu_countries']['inherit'])) {
+                    $europeanUnionCountriesSelectedValues = false;
+                }
+            } else {
+                $europeanUnionCountriesSelectedValues = false;
+            }
+            if (!$europeanUnionCountriesSelectedValues) {
+                throw new LocalizedException(
+                    __('Something went wrong while saving this configuration.')
+                );
+            }
+
             /** @var \Magento\Config\Model\Config $configModel */
             $configModel = $this->_configFactory->create(['data' => $configData]);
             $configModel->save();

app/code/Magento/Config/Test/Mftf/ActionGroup/EuropeanCountriesOptionActionGroup.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
+    <actionGroup name="EuropeanCountriesOptionActionGroup">
+        <annotations>
+            <description>Validate european country option value</description>
+        </annotations>
+
+        <amOnPage url="{{AdminConfigGeneralPage.url}}" stepKey="navigateToAdminStoreConfiguration"/>
+        <conditionalClick selector="{{CountriesFormSection.block}}" dependentSelector="{{CountriesFormSection.label}}" visible="false" stepKey="expand_panel"/>
+        <scrollTo selector="{{CountriesFormSection.label}}" stepKey="scrolltolabel" />
+        <wait time="2" stepKey="waitForLoad"/>
+        <uncheckOption selector="{{CountriesFormSection.useConfigSettings}}" stepKey="uncheckConfigSetting"/>
+        <wait time="2" stepKey="waitForLoad1"/>
+        <click selector="{{CountriesFormSection.saveConfig}}" stepKey="clickSave"/>
+    </actionGroup>
+</actionGroups>

app/code/Magento/Config/Test/Mftf/Section/CountriesFormSection.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
+    <section name="CountriesFormSection">
+        <element name="optionvalue" type="select" selector='//*[@id="general_country_eu_countries"]'/>
+        <element name="saveConfig" type="button" selector="#save" timeout="30"/>
+        <element name="label" type="input" selector="#row_general_country_optional_zip_countries"/>
+        <element name="useConfigSettings" type="checkbox" selector="//input[@name='groups[country][fields][eu_countries][inherit]']"/>
+        <element name="block" type="button" selector='a#general_country-head'/>
+    </section>
+</sections>

app/code/Magento/Config/Test/Mftf/Test/ValidateEuropeanCountriesOptionValue.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
+    <test name="ValidateEuropeanCountriesOptionValue">
+        <annotations>
+            <features value="Backend"/>
+            <stories value="Check european countries option value"/>
+            <title value="There must be atleast one european country selected"/>
+            <description value="There must be atleast one european country selected"/>
+            <severity value="CRITICAL"/>
+            <group value="config"/>
+            <testCaseId value="AC-6385"/>
+        </annotations>
+        <before>
+            <actionGroup ref="AdminLoginActionGroup" stepKey="login"/>
+            <actionGroup ref="EuropeanCountriesOptionActionGroup" stepKey="validate"/>
+        </before>
+        <after>
+            <actionGroup ref="AdminLogoutActionGroup" stepKey="logout"/>
+        </after>
+    </test>
+</tests>